CN200969052Y - Central air-conditioning environment monitoring energy-saving apparatus - Google Patents
Central air-conditioning environment monitoring energy-saving apparatus Download PDFInfo
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- CN200969052Y CN200969052Y CN 200620067150 CN200620067150U CN200969052Y CN 200969052 Y CN200969052 Y CN 200969052Y CN 200620067150 CN200620067150 CN 200620067150 CN 200620067150 U CN200620067150 U CN 200620067150U CN 200969052 Y CN200969052 Y CN 200969052Y
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Abstract
The utility model relates to an environment monitoring and energy saving device of central air conditioner, which comprises a control circuit with power source. The control circuit is provided with a temperature input interface which is connected with a monitoring point temperature sensor of the central air conditioner, a control transducer output interface and a transducer feedback input interface. The control circuit comprises a singlechip. The temperature sensing signals from the temperature input interface are inputted to the singlechip, and the transducer controlling signals from the singlechip are outputted to the control transducer output interface. The transducer feedback signals inputted by the transducer feedback input interface are inputted in the singlechip. By adopting singlechip controlling circuit, the utility model achieves analysis and processing for signals of the sensors, generates feedback control signals in accordance with preset value, and makes the transducers provide the best energy saving status of freezing pump, cooling water pump and fan of cooling tower according to energy saving control algorithm in control software, thereby realizing the work mode of air flow conversion and wind flow conversion, and achieving the objects of saving energy, improving control effect and prolonging the service life of the device.
Description
Technical field:
The utility model relates to a kind of environmental monitoring energy saver of central air conditioner.
Background technology:
Central air conditioner generally includes air-conditioner host, chilled water system, the cooling water system blower fan of cooling tower system etc. that unifies, because during design, central air conditioner must situation the hottest by weather, that load is maximum design, multiply by 0～20% safety coefficient again, and in fact, the overwhelming majority time, air-conditioning is can not operate under the full load condition, according to relevant departments statistics, it is following that central air conditioner system has time of 90% to run on 75% load.Present case is: most of central air conditioner systems all adopt constant flow, constant air volume system, promptly as long as start air-conditioner host, chilled water pump, cooling-water pump, blower fan of cooling tower etc. all move under 50Hz power frequency state, air quantity, the excessive situation of the water yield often occur, cause the waste of energy.As seen, there be bigger having more than needed in present central air conditioner system, so energy-conservation potentiality are bigger.China utility model patent CN2331900Y discloses a kind of air conditioner water pump frequency conversion energy-saving control device, it is provided with temperature sensor respectively at chilled water import and export and chilled water import and export, utilize the temperature approach of chilled water import and export and chilled water import and export to compare, control the running frequency of water pump with setting temperature approach.This structure can according to circumstances be adjusted the rotating speed of pump motor, plays certain energy-conserving action, still, the ruuning situation of central air conditioner, its influence factor is many-sided, and air-conditioning system is a system non-linear, that time variation is strong, and the simple temperature difference is regulated and can not be reached good effect.
The utility model content:
The purpose of this utility model just provides a kind of central air conditioner environmental monitoring energy saver, by the effective Detection ﹠ Controling to the central air conditioner each several part, reaches energy-conservation, improves the purpose of controlling effect, improving service life of equipment.
For achieving the above object, the utility model central air conditioner environmental monitoring energy saver, comprise the control circuit that has power supply, control circuit is provided with the temperature input interface that at least one road connects central air conditioner check point temperature sensor, at least one road control of conversion device output interface, described control circuit also is provided with at least one road frequency converter feedback input interface, and this control circuit comprises single-chip microcomputer, and the temperature sensor signal of at least one road of control circuit temperature input interface input is imported single-chip microcomputer respectively; At least one road of control circuit control of conversion device output interface, its each road control of conversion device output interface comprises that one tunnel control of conversion device state output interface that connects corresponding frequency converter State Control terminal is connected the control of conversion device rotating speed output interface of corresponding frequency converter rotating speed control terminal with one the tunnel, the frequency converter state control signal that single-chip microcomputer exports the single-chip data bus to is successively through the data latching of single-chip microcomputer timesharing gating, light-coupled isolation, relay, be passed at least one road control of conversion device state output interface, the frequency converter speed controling signal that single-chip microcomputer exports the single-chip data bus to is successively through the D/A digital-to-analog conversion of single-chip microcomputer timesharing gating, the voltage/current conversion is passed at least one road control of conversion device rotating speed output interface; At least one road of control circuit frequency converter feedback input interface, its each road frequency converter feedback input interface comprises that one tunnel frequency converter feedback of status input interface that connects corresponding frequency converter state output end is connected the frequency converter speed feedback input interface of frequency converter rotating speed lead-out terminal with one the tunnel, the frequency converter feedback of status signal of at least one road frequency converter feedback of status input interface input is successively through capacitance-resistance filter, light-coupled isolation, the data latching of single-chip microcomputer timesharing gating, be input to the data bus of single-chip microcomputer, the frequency converter speed feedback signal of at least one road frequency converter speed feedback input interface input is successively through capacitance-resistance filter, the A/D analog to digital conversion of single-chip microcomputer timesharing gating is input to the data bus of single-chip microcomputer; Described power supply output light-coupled isolation input circuit and the required direct supply independently of one another of output circuit.
As further improvement of the utility model, described control circuit also is provided with the pressure input interface that at least one road connects central air conditioner check point pressure transducer, the pressure sensor signal input single-chip microcomputer of this at least one road pressure input interface input.
Further improve as of the present utility model, control circuit is provided with the keyboard input interface that connects keyboard, is provided with the Chinese character display module; Control circuit is connected to the clock circuit that single-chip microcomputer provides clock signal, is connected to the IC-card circuit that single-chip microcomputer reads IC-card information.
Further improve again as of the present utility model, control circuit is provided with RS232 communication interface and RS485 communication interface, pass through communication interface, the utility model can be connected with monitor terminal, and monitor terminal can be provided with network interface, and by network interface, the utility model can communicate with remote supervisory and control(ling) equipment, provide data message for analysis to remote supervisory and control(ling) equipment, perhaps receive controlled variable from remote supervisory and control(ling) equipment.
In a preferred embodiment, at least one road temperature input interface of above-mentioned control circuit is provided with five the tunnel, and the temperature sensor with central air conditioner chilled water water inlet and water delivering orifice, cooling water intake and water delivering orifice and outdoor check point is connected respectively.At least one road control of conversion device state output interface of above-mentioned control circuit, at least one road control of conversion device rotating speed output interface, at least one road frequency converter feedback of status input interface, at least one road frequency converter speed feedback input interface are equipped with ten six the tunnel, are connected with six road chilled water pumps, No. six cooling-water pumps, the corresponding frequency converter State Control terminal of four road blower fan of cooling tower, frequency converter rotating speed control terminal, frequency converter state output end, the frequency converter rotating speed lead-out terminal of central air conditioner respectively.At least one road pressure input interface of above-mentioned control circuit is provided with four the tunnel, is connected with water delivering orifice, cooling water intake and the pressure transducer of water delivering orifice check point with central air conditioner chilled water water inlet respectively.
The utility model is owing to adopt single chip machine controlling circuit, by the establishment Control Software, can realize analyzing and processing to each sensor signal, produce feedback control signal according to setting value, control the frequency converter work of chilled water pump, cooling-water pump and blower fan of cooling tower in the central air conditioner system respectively, make it by the Energy Saving Control algorithm in the Control Software, chilled water pump, cooling-water pump and blower fan of cooling tower are operated in the maximum energy-saving state, realize the working method of unsteady flow amount, variable air rate, reach energy-saving and cost-reducing with this, prolong the purpose of service life of equipment.
Description of drawings:
Fig. 1 is the system architecture synoptic diagram of the utility model embodiment;
Fig. 2 is the utility model embodiment digital temperature transducing signal input circuit structured flowchart;
Fig. 3 is the utility model embodiment frequency converter state control signal output circuit structure block diagram;
Fig. 4 is the utility model embodiment frequency converter speed controling signal output circuit structure block diagram;
Fig. 5 is the utility model embodiment frequency converter feedback of status signal input circuit structured flowchart;
Fig. 6 is the utility model embodiment frequency converter speed feedback signal input circuit structured flowchart;
Fig. 7 is the utility model embodiment keyboard data signal input circuit structured flowchart;
Fig. 8 is the utility model embodiment display data signal output circuit structure block diagram;
Fig. 9 is the utility model embodiment delivery outlet expanded circuit schematic diagram;
Embodiment:
The CONSTRUCTED SPECIFICATION of the utility model embodiment is described in detail in detail below in conjunction with accompanying drawing:
As shown in Figure 1, system architecture synoptic diagram for embodiment, comprise the control circuit that has power supply, this control circuit is provided with five tunnel temperature input interfaces, the temperature sensor that connects the central air conditioner temperature detecting point respectively, central air conditioner temperature detecting point are arranged on chilled water water inlet and water delivering orifice, cooling water intake and water delivering orifice and outdoor.Control circuit also is provided with ten six tunnel control of conversion device output interfaces and ten No. six frequency converters feedback input interface, and ten No. six frequency converters refer to six road chilled water pumps, No. six cooling-water pumps of central air conditioner, the frequency converter of four road blower fan of cooling tower.Ten six tunnel control of conversion device output interfaces, its each road comprises one tunnel control of conversion device state output interface and one tunnel control of conversion device rotating speed output interface, each road control of conversion device state output interface connects corresponding frequency converter State Control terminal, and each road control of conversion device rotating speed output interface connects corresponding frequency converter rotating speed control terminal; Ten No. six frequency converters feedback input interface, its each road comprises No. one frequency converter feedback of status input interface and No. one frequency converter speed feedback input interface, each road frequency converter feedback of status input interface connects corresponding frequency converter state output end, and each road frequency converter speed feedback input interface connects corresponding frequency converter rotating speed lead-out terminal.
Control circuit comprises single-chip microcomputer, as shown in Figure 2, be embodiment digital temperature transducing signal input circuit structured flowchart, the temperature sensor of present embodiment is selected the digital thermometer DS18B20 of u s company for use, the digital temperature signal of five digital thermometer DS18B20 outputs, import eight way switch through five tunnel temperature input interfaces of control circuit respectively, eight way switch are through single-chip microcomputer timesharing gating, and timesharing is with an I/O I/O mouth line of way word temperature signal input single-chip microcomputer.Adopt eight way switch of single-chip microcomputer timesharing gating, make scm software need not to consider the fuselage code of digital thermometer DS18B20, make things convenient for the replacing of digital thermometer.Single-chip microcomputer is according to the chilled water that detects and the temperature difference of chilled water entery and delivery port, Control Software control of conversion device operation by establishment, reach maximum energy-saving control, but according to maximum power point, the minimum power point of environment temperature fixed software algorithm, to satisfy Various Seasonal and the energy-conservation requirement of one day different period.
Control circuit can also be provided with four road pressure input interfaces, connects the pressure transducer of central air conditioner hydraulic pressure check point respectively, and central air conditioner hydraulic pressure check point is arranged on chilled water water inlet and water delivering orifice, cooling water intake and water delivering orifice.The pressure sensor signal of four pressure transducer outputs is respectively through four road pressure input interfaces input single-chip microcomputer.
As shown in Figure 3, be embodiment frequency converter state control signal output circuit structure block diagram, the frequency converter state control signal of single-chip microcomputer output is delivered to data latches through the single-chip data bus, deliver to corresponding light-coupled isolation through the Single-chip Controlling timesharing, drive corresponding relay through amplifying, export respectively by ten six tunnel control of conversion device state output interfaces again, control the startup of ten No. six frequency converters and stop.For improving reliability, light-coupled isolation is all adopted in the output of frequency converter state control signal.
As shown in Figure 4, be embodiment frequency converter speed controling signal output circuit structure block diagram, deliver to the D/A digital-to-analog conversion of single-chip microcomputer timesharing gating by the single-chip data bus through the frequency converter speed controling signal of single-chip microcomputer Energy Saving Control algorithm output, through each road voltage/current conversion, the dc current signal of output 4-20 milliampere, export respectively by ten six tunnel control of conversion device rotating speed output interfaces, control the rotating speed of ten No. six frequency converters, i.e. Yun Zhuan speed.
As shown in Figure 5, be embodiment frequency converter feedback of status signal input circuit structured flowchart, for improving reliability, light-coupled isolation is all adopted in the input of frequency converter feedback of status signal.The frequency converter feedback of status signal of ten No. six frequency converter feedback of status input interfaces inputs is successively through the data latching of capacitance-resistance filter, light-coupled isolation, single-chip microcomputer timesharing gating, be input to the data bus of single-chip microcomputer, ten No. six frequency converter feedback of status signals divide the time-division secondary to read in through single-chip microcomputer.
As shown in Figure 6, be embodiment frequency converter speed feedback signal input circuit structured flowchart, the frequency converter speed feedback signal of ten No. six frequency converter speed feedback input interfaces inputs is successively through the A/D analog to digital conversion of capacitance-resistance filter, single-chip microcomputer timesharing gating, be input to the data bus of single-chip microcomputer, ten No. six frequency converter speed feedback signals divide the time-division secondary to read in by single-chip microcomputer.Ten No. six frequency converter speed feedback signals are operating frequency signals of frequency converter, and behind the input single-chip microcomputer, this signal constitutes motor revolution closed-loop control system and participates in the energy-saving effect computing.
As shown in Figure 1, control circuit is provided with the keyboard input interface that connects keyboard, is provided with the Chinese character display module.As shown in Figure 7, be embodiment keyboard data signal input circuit structured flowchart, the keyboard data of keyboard input interface input inputs to the data bus of single-chip microcomputer through the data latching of single-chip microcomputer timesharing gating; As shown in Figure 8, be embodiment display data signal output circuit structure block diagram, the display data signal that single-chip microcomputer exports the single-chip data bus to inputs to the Chinese character display module through the data latching of single-chip microcomputer timesharing gating.The Chinese character display module of present embodiment adopts the Chinese character liquid crystal display, the Chinese character liquid crystal display is as the interface of man-machine interaction, the temperature, the temperature difference that realize the central air conditioner check point show, the demonstration of running status, the functions such as demonstration of parameter setting, present embodiment adopts the LCD MODULE of band Hanzi font library, has simplified design circuit.What keyboard input realized display screen changes functions such as screen, the setting of parameter.
As shown in Figure 1, control circuit is connected to the clock circuit that single-chip microcomputer provides clock signal, is connected to the IC-card circuit that single-chip microcomputer reads IC-card information.The practical work clock circuit provides a clock accurately for present embodiment, so that can carry out Based Intelligent Control by the different periods of every day, as the prepare control before working every day, the while is as the time standard of energy saving calculation.The IC-card circuit is supplemented with money as user's affirmation and user account fund, is not to confirm client or clients fund deficiency, all can not realize energy conservation model.
As shown in Figure 1, control circuit is provided with communication interface, comprises RS232 communication interface and RS485 communication interface, and the RS232 communication interface connects a serial ports of single-chip microcomputer through the RS232 interface chip, the RS485 communication interface connects another serial ports of single-chip microcomputer through RS485 interface chip, light-coupled isolation.Present embodiment is provided with RS232 communication interface and RS485 communication interface, can realize the communication with host computer, with the communication of terminal device, can also realize the multimachine networking simultaneously.
Be to isolate the direct supply of light-coupled isolation input circuit and output circuit, the power supply of present embodiment is exported three tunnel direct supplys independent of each other, is respectively+5V, S+5V and S+12V.+ 5V is the power supply of single chip circuit, and S+5V is the power supply of RS485 communication interface circuit, and S+12V is the power supply of convertible circuit.
Problem for the I/O I/O mouth line deficiency that solves single-chip microcomputer, be provided with the delivery outlet expanded circuit, the delivery outlet expanded circuit of present embodiment is arranged between the circuit gating end of the I/O I/O mouth line of single-chip microcomputer and data latching, D/A digital-to-analog conversion, A/D analog to digital conversion, multi-way switch.As shown in Figure 9, the delivery outlet expanded circuit of single-chip microcomputer U1 is made of two 74LS138 code translator U3, U4, and its delivery outlet line/CS1 is connected with the circuit gating end of circuit such as above-mentioned data latching, D/A digital-to-analog conversion, A/D analog to digital conversion, multi-way switch respectively to/CS16.By the software of establishment, the corresponding circuit of single-chip microcomputer timesharing gating is realized the timesharing control of data signal transmission.
Present embodiment is when real work, by the Control Software in the single-chip microcomputer storer, can realize analyzing and processing to each sensor signal, produce feedback control signal according to setting value, frequency converter work with the chilled water pump of controlling air-conditioning respectively, cooling-water pump, blower fan of cooling tower system, its state and setting value can observe on Chinese liquid crystal display screen and be provided with, if be connected with the host computer data analysis center, but time recording related data also then, so that adopt computer program to analyze automatically or the manual analysis intervention, further improve energy-saving efficiency.
The utility model can be realized the integral body control to central air conditioner, and its each several part course of work is as follows:
1. chilled water loop:
Determine the minimum running frequency of a chilled water earlier according to freezing loop characteristics, guarantee system safety operation.Work as environment temperature, when air conditioner load changes, chilled water is for backwater, promptly advance, water delivering orifice temperature sensor and outdoor temperature sensor are delivered to control circuit with detected these parameters, control circuit is according to the real time data of being gathered and the history data of system, calculate the required refrigerating capacity of air conditioner load in real time, and chilled water supply and return water temperature, the optimum value of the temperature difference, take these values and present operational factor to compare, and regulate the frequency converter output frequency with this, the rotating speed of control chilled water pump, change its flow, make the supply and return water temperature of chilled water system, the temperature difference and flow operate in the optimal value that control circuit provides.
2. chilled water loop:
Determine the minimum running frequency of a cooling-water pump, the highest, the minimum temperature of chilled water water inlet earlier according to the cooling system characteristic, guarantee system safety operation.When environment temperature, when air conditioner load changes, the load of central air conditioner main machine will change thereupon, and the best condensing temperature of main condenser also changes thereupon.Control circuit is according to the real time data of being gathered and the history data of system, calculate the best condensing temperature and the best water inlet temperature of chilled water of main condenser, and compare with this temperature and actual motion temperature, and then the output frequency of adjusting cooling-water pump frequency converter, the running of control cooling-water pump, the flow of dynamic adjustments chilled water, the optimal value that the water inlet temperature approaches fuzzy control software of chilled water is provided, thus guaranteeing that central air conditioner main machine is under the optimal conversion efficiency at any time moves.Because cooling water system adopts optimal conversion efficiency control, guaranteed that central air conditioner main machine is under the situation of full load and part load, all be in optimum Working, remain best energy utilization rate, thereby reduce the energy consumption of air-conditioner host, move because of cooling-water pump is lower than under the rated load through being everlasting simultaneously, also saved the energy consumption of cooling-water pump to greatest extent.
3. blower fan of cooling tower control system:
Determine the minimum running frequency of a blower fan earlier according to the cooling tower system performance, guarantee system safety operation.When environment temperature, when air conditioner load changes, the temperature sensor signal of outdoor temperature sensor and cooling water intake temperature sensor is delivered to the blower fan of cooling tower control system, this subsystem is according to real time data of being gathered and historical data, calculate the cold in-water temperature value that meets main frame operating mode needs, and regulate the frequency converter output frequency with this, the control rotation speed of fan obtains good energy-saving effect.
Simultaneously, with the situation of host computer networking under, the utility model be except can realizing Automatic Control, timed power on/off, air-conditioner host, water pump, the blower fan co-ordination can also realize Long-distance Control.At this moment, can set up database for air-conditioning system, by the data analysis center of far-end, analyze real time data and historical data, constantly improve program, and provide operation instruction, it is more accurate that load simulation is got, and power savings is better.
The utility model compared with prior art has following advantages:
1. because the utility model is provided with outdoor temperature sensor, can realize on the one hand to blower fan being The VFC of system realizes energy-conservationly, and provides more comfortable environment, on the other hand, can more have The operation of effect ground control chilled water pump and cooling water pump improves energy-saving effect.
2. the utility model passes by a temperature is set at cooling water intake in the cooling water loop Sensor utilizes historical data and the air-conditioner host of characteristic and the outdoor temperature situation of cooling water loop Load condition, analyze the optimum temperature value of cooling water water inlet, control the fortune of adjusting cooling water pump The row load is compared better effects if with adopting single temperature differential method control cooling water pump.
3. the utility model can connect the computer terminal, and connected to the network by the computer terminal, so, Can realize Long-distance Control. Thus, can realize by control software, monitoring software and air-conditioning system The software control system that the database composition function is powerful, and in service in program, constantly improve its number According to the storehouse system, and then analyze, revise operational factor, reach optimal control results and energy and save.
Claims (10)
1, central air conditioner environmental monitoring energy saver, comprise the control circuit that has power supply, control circuit is provided with the temperature input interface that at least one road connects central air conditioner check point temperature sensor, at least one road control of conversion device output interface, it is characterized in that: described control circuit also is provided with at least one road frequency converter feedback input interface, this control circuit comprises single-chip microcomputer, and the temperature sensor signal of at least one road of control circuit temperature input interface input is imported single-chip microcomputer respectively; At least one road of control circuit control of conversion device output interface, its each road control of conversion device output interface comprises that one tunnel control of conversion device state output interface that connects corresponding frequency converter State Control terminal is connected the control of conversion device rotating speed output interface of corresponding frequency converter rotating speed control terminal with one the tunnel, the frequency converter state control signal that single-chip microcomputer exports the single-chip data bus to is successively through the data latching of single-chip microcomputer timesharing gating, light-coupled isolation, relay, be passed at least one road control of conversion device state output interface, the frequency converter speed controling signal that single-chip microcomputer exports the single-chip data bus to is successively through the D/A digital-to-analog conversion of single-chip microcomputer timesharing gating, the voltage/current conversion is passed at least one road control of conversion device rotating speed output interface; At least one road of control circuit frequency converter feedback input interface, its each road frequency converter feedback input interface comprises that one tunnel frequency converter feedback of status input interface that connects corresponding frequency converter state output end is connected the frequency converter speed feedback input interface of frequency converter rotating speed lead-out terminal with one the tunnel, the frequency converter feedback of status signal of at least one road frequency converter feedback of status input interface input is successively through capacitance-resistance filter, light-coupled isolation, the data latching of single-chip microcomputer timesharing gating, be input to the data bus of single-chip microcomputer, the frequency converter speed feedback signal of at least one road frequency converter speed feedback input interface input is successively through capacitance-resistance filter, the A/D analog to digital conversion of single-chip microcomputer timesharing gating is input to the data bus of single-chip microcomputer; Described power supply output light-coupled isolation input circuit and the required direct supply independently of one another of output circuit.
2, energy saver according to claim 1 is characterized in that: at least one road temperature input interface of described control circuit connects an I/O I/O mouth line of single-chip microcomputer through the multi-way switch of single-chip microcomputer timesharing gating.
3, energy saver according to claim 2 is characterized in that: at least one road temperature input interface of described control circuit be provided with central air conditioner chilled water water inlet be connected with water delivering orifice, cooling water intake and water delivering orifice and outdoor check point temperature sensor five the tunnel.
4, energy saver according to claim 1 is characterized in that: at least one road control of conversion device state output interface of described control circuit, at least one road control of conversion device rotating speed output interface, at least one road frequency converter feedback of status input interface, at least one road frequency converter speed feedback input interface is equipped be connected with six road chilled water pumps, No. six cooling-water pumps, the corresponding frequency converter State Control terminal of four road blower fan of cooling tower, frequency converter rotating speed control terminal, frequency converter state output end, the frequency converter rotating speed lead-out terminal of central air conditioner ten six the tunnel.
5, energy saver according to claim 1 is characterized in that: described control circuit is provided with the keyboard input interface that connects keyboard, and the keyboard data of keyboard input interface input inputs to the data bus of single-chip microcomputer through the data latching of single-chip microcomputer timesharing gating; Described control circuit is provided with the Chinese character display module, and the display data signal that single-chip microcomputer exports the single-chip data bus to inputs to the Chinese character display module through the data latching of single-chip microcomputer timesharing gating.
6, energy saver according to claim 1 is characterized in that: described control circuit is connected to the clock circuit that single-chip microcomputer provides clock signal, is connected to the IC-card circuit that single-chip microcomputer reads IC-card information.
7, energy saver according to claim 1, it is characterized in that: described control circuit is provided with RS232 communication interface and RS485 communication interface, the RS232 communication interface connects a serial ports of single-chip microcomputer through the RS232 interface chip, the RS485 communication interface connects another serial ports of single-chip microcomputer through RS485 interface chip, light-coupled isolation.
8, energy saver according to claim 1, it is characterized in that: described control circuit is provided with the pressure input interface that at least one road connects central air conditioner check point pressure transducer, and the pressure sensor signal of this at least one road pressure input interface input is imported single-chip microcomputer respectively.
9, energy saver according to claim 8 is characterized in that: at least one road pressure input interface of described control circuit be provided with central air conditioner chilled water water inlet be connected with water delivering orifice, cooling water intake and water delivering orifice check point pressure transducer four the tunnel.
10, according to each described energy saver of claim 1 to 9, it is characterized in that: the I/O I/O mouth line of described single-chip microcomputer is connected to the delivery outlet expanded circuit, and the circuit gating end of the delivery outlet line of this delivery outlet expanded circuit and data latching, D/A digital-to-analog conversion, A/D analog to digital conversion, multi-way switch is connected.
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| CN 200620067150 CN200969052Y (en) | 2006-11-03 | 2006-11-03 | Central air-conditioning environment monitoring energy-saving apparatus |
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| CN 200620067150 CN200969052Y (en) | 2006-11-03 | 2006-11-03 | Central air-conditioning environment monitoring energy-saving apparatus |
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| CN102062460A (en) * | 2011-01-20 | 2011-05-18 | 四川依米康环境科技股份有限公司 | Accurate air supply system of air conditioning unit and realizing method thereof |
| CN102226565A (en) * | 2011-04-12 | 2011-10-26 | 济南大学 | Novel intelligent ventilating frequency-conversion controller |
| CN101930220B (en) * | 2009-06-18 | 2012-06-20 | 财团法人工业技术研究院 | Ice water system and control method thereof |
| CN102880330A (en) * | 2011-07-14 | 2013-01-16 | 富泰华工业（深圳）有限公司 | Inductor circuit and electronic device with inductor circuit |
| CN104456855A (en) * | 2014-12-25 | 2015-03-25 | 李钢 | Concentrated air conditioner distribution type cooling draught fan controller |
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- 2006-11-03 CN CN 200620067150 patent/CN200969052Y/en not_active Expired - Fee Related
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| CN101930220B (en) * | 2009-06-18 | 2012-06-20 | 财团法人工业技术研究院 | Ice water system and control method thereof |
| CN102062460A (en) * | 2011-01-20 | 2011-05-18 | 四川依米康环境科技股份有限公司 | Accurate air supply system of air conditioning unit and realizing method thereof |
| CN102226565A (en) * | 2011-04-12 | 2011-10-26 | 济南大学 | Novel intelligent ventilating frequency-conversion controller |
| CN102226565B (en) * | 2011-04-12 | 2013-07-17 | 济南大学 | Novel intelligent ventilating frequency-conversion controller |
| CN102880330A (en) * | 2011-07-14 | 2013-01-16 | 富泰华工业（深圳）有限公司 | Inductor circuit and electronic device with inductor circuit |
| CN102880330B (en) * | 2011-07-14 | 2016-10-12 | 富泰华工业（深圳）有限公司 | Inductor circuit and there is the electronic installation of this inductor circuit |
| CN104456855A (en) * | 2014-12-25 | 2015-03-25 | 李钢 | Concentrated air conditioner distribution type cooling draught fan controller |
| CN104456855B (en) * | 2014-12-25 | 2017-09-26 | 李钢 | Central air conditioning distribution cooling blower controller |
| CN109945461A (en) * | 2019-04-19 | 2019-06-28 | 珠海格力电器股份有限公司 | Electronic circuit and electrical equipment |
| CN112255952A (en) * | 2020-10-29 | 2021-01-22 | 中国航发南方工业有限公司 | Digital electronic control device of gas turbine generator set |
| CN112286098A (en) * | 2020-10-29 | 2021-01-29 | 中国航发南方工业有限公司 | Conversion board subassembly, gas turbine generating set's digital electronic control device |
| CN112255952B (en) * | 2020-10-29 | 2022-04-01 | 中国航发南方工业有限公司 | Digital electronic control device of gas turbine generator set |
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